Question

The respiratory membrane is a very thin membrane. It facilitates the exchange of respiratory gases through diffusion. Oxygen enters deoxygenated blood through diffusion because the

• A. partial pressure of oxygen in alveolar air and capillaries is $40\, mm \,Hg$ and $100 \,mm \,Hg$ respectively.
• B. partial pressure of oxygen in alveolar air and capillaries is $100\, mm \,Hg$ and $40\, mm \,Hg$ respectively.
• C. partial pressure of oxygen in alveolar air and capillaries air is $46\, mm \,Hg$ and $40\, mm \,Hg$ respectively
• D. partial pressure of oxygen in alveolar air and capillaries is $40\, mm\, Hg$ and $46\, mm \,Hg$ respectively

Answer 1

Answer: (B)

Correct answer is (b) partial pressure of oxygen in alveolar air and capillaries is $100\, mm \,Hg$ and $40\, mm \,Hg$ respectively.